The conversation between Scorsese, DeNiro, Pacino and Pesci available on Netflix is a must watch. They get into the differences between this and Goodfellas. This is where Pesci says he wanted to play Tony Pro but Scorsese insisted he play a more mild mannered character this time. If Scorsese wanted a Goodfellas-Casino feel to it he would have had Pesci play a more aggressive character, and he could have done it with the de-aging technology. It's not like he has to jump out of helicopters. All he has to do is pull a trigger and cuss a lot.

When you consider the lengthy demise of Sheeran and Buffalino (there's about 45 min. of movie left after Hoffa is killed) I think this is what Scorsese wanted to do differently this time. The frailty of an aging gangster. The isolation from a disapproving family. Once the money stops rolling in their friends are gone. The ones who die young just might be the lucky ones.